“Positronium is the simplest atom composed of equal-mass constituents, and until it self-annihilates, it behaves as a neutral ...

Strange pulses that don't seem to abide by the laws of particle physics have been detected in Antarctica. These radio waves, emanating from below the ice, could be evidence of dark matter and have ...

Physicists have finally confirmed a phenomenon that sounds like pure science fiction: waves that appear to bounce off a sudden change in time rather than a surface in space. The effect, known as a ...